[ci-scan] Build break: CS0246 InvalidCSharp not found in ByRefLike/Validate.csproj (minifullaot)

[github-actions]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1440191
Build error leg or test failing: linux-x64 Release AllSubsets_Mono_MiniFullAot_RuntimeTests minifullaot / Build Tests

Error Details

src/tests/Loader/classloader/generics/ByRefLike/Validate.cs(73,20): error CS0246: The type or namespace name 'InvalidCSharp' could not be found (are you missing a using directive or an assembly reference?) [src/tests/Loader/classloader/generics/ByRefLike/Validate.csproj]
src/tests/Loader/classloader/generics/ByRefLike/GenericTypeSubstitution.cs(8,7): error CS0246: The type or namespace name 'InvalidCSharp' could not be found (are you missing a using directive or an assembly reference?) [src/tests/Loader/classloader/generics/ByRefLike/Validate.csproj]

The InvalidCSharp assembly reference is unresolved during the minifullaot test build, causing CS0246 compile errors in the ByRefLike/Validate test project.

Error Message

true only for clear infra flakes. ExcludeConsoleLog skips helix log scanning. -->

{
  "ErrorMessage": "error CS0246: The type or namespace name 'InvalidCSharp' could not be found (are you missing a using directive or an assembly reference?) [/__w/1/s/src/tests/Loader/classloader/generics/ByRefLike/Validate.csproj]",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Impact on platforms

• runtime-extra-platforms (def 154) / linux-x64 Release AllSubsets_Mono_MiniFullAot_RuntimeTests minifullaot / Build Tests
• Occurrences in window: 3+ (builds 1436493, 1438268, 1440191)

First build it occurred

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1433744
• Finished: 2026-05-25T09:02:27Z
• Persistent across the entire scanned window; true origin may predate 2026-05-24.

---

Filed by ci-failure-scan, which scans dnceng-public outer-loop pipelines on main and converts stable failures into KBEs and test-disable PRs.

Generated by CI Outer-Loop Failure Scanner · ● 16.3M · ◷

Report

Build	Repository	Step Name	Console log	Pull Request
1444966	dotnet/runtime	Build Tests	Log
1444461	dotnet/runtime	Build Tests	Log
1443269	dotnet/runtime	Build Tests	Log
1442805	dotnet/runtime	Build Tests	Log
1442609	dotnet/runtime	Build Tests	Log
1442436	dotnet/runtime	Build Tests	Log
1442382	dotnet/runtime	Build Tests	Log
1442258	dotnet/runtime	Build Tests	Log
1441940	dotnet/runtime	Build Tests	Log
1441846	dotnet/runtime	Build Tests	Log
1441437	dotnet/runtime	Build Tests	Log
1440694	dotnet/runtime	Build Tests	Log	#127498
1440408	dotnet/runtime	Build Tests	Log	#128448
1438268	dotnet/runtime	Build Tests	Log

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
2	14	14

[jeffschwMSFT]

@vitek-karas / @steveisok what is this leg validating? monoVM on Linux X64 with full AOT?

[steveisok]

@vitek-karas / @steveisok what is this leg validating? monoVM on Linux X64 with full AOT?

Yes, it's one of the canaries for other configurations legs. I'm not sure we really need it.